FILE - In this Sept. 3, 2007, file photo Democratic presidential hopeful, U.S. Sen Barack Obama, D-Ill., waves as he rides in the Labor Day parade in Milford, N.H. Obama crossed paths at the parade with another rising political star and presidential contender, Mitt Romney, as both sought to line up votes in the New Hampshire primary. They shook hands, exchanged a few pleasantries and turned their attention to the voters. When they stand side by side on the presidential debate stage Wednesday night, Oct. 3, 2012, it will be one of the few times they have ever even met in person. (AP Photo/Jim Cole, File)